Yield strength of welded steel, MPa

Minimum fillet weld leg for the thickness of the thicker element being welded

from 3 to 4

St. 4 to 5

St. 5 to 10

St. 10 to 16

St. 16 to 22

St. 22 to 32

St. 32 to 40

St. 40 to 80

Up to 400

St. 400 to 450

Fillet weld legs for welding methods

Manual arc

In carbon dioxide, use Sv-08G2S wire with a diameter of 1.4 to 2.0 mm instead of type electrodes

In carbon dioxide, use Sv-08G2S wire with a diameter of 0.8 to 1.2 mm instead of type electrodes

E42A and E42

E46A and E46

E50A and E50

E42A and E42

E46A and E46

Fillet weld leg for the ratio of the tensile strength of the weld metal to the tensile strength of the base metal

5. When making the root of a multilayer weld using a welding method different from the main method by which the edges are filled, the values ​​of the structural elements of the welded joint must be selected according to the main welding method. In this case, the designation of the welding method should be made as a fraction, the numerator of which indicates the designation of the welding method of the root of the seam, and the denominator indicates the designation of the main welding method.

6. For welded joints C12, C21, C23, C24, U7, U10, T7, having the thickness of the parts s= 12 mm or more, as well as for connections C15, C16, C25, C27, U8, T8, having the thickness of the parts s= 20 mm or more, performed using the UP welding method, blunting is allowed With= 5 ± 2 mm.

Crap. 2.

Crap. 3.

8. Size and maximum deviations of fillet weld leg TO And K 1 must be installed during design. In this case, the leg size should be no more than 3 mm for parts with a thickness of up to 3 mm inclusive, and 1.2 times the thickness of a thinner part when welding parts with a thickness of over 3 mm. The maximum deviations of the leg size of fillet welds from the nominal value are given in.

9. (Deleted, Amendment No. 1).

10. (Deleted, Amendment No. 3).

11. Convexity or concavity of a fillet weld is allowed up to 30% of its leg, but not more than 3 mm. In this case, concavity should not lead to a decrease in the value of the leg K p(Fig. 4), installed during design.

Crap. 4 .

Note: Cathetus TO nis the leg of the largest right triangle inscribed in the outer part of the fillet weld. With a symmetrical seam behind the leg TO nany of the equal legs is accepted, with an asymmetrical seam - the smaller one.

(Changed edition, Amendment No. 3).

12. Before welding, the displacement of the edges relative to each other is allowed no more than:

0,2s mm - for parts up to 4 mm thick;

0,1s+ 0.5 mm - for parts with a thickness of 5 - 25 mm;

3 mm - for parts with a thickness of 25 - 50 mm;

0,04s+ 1.0 mm - for parts with a thickness of 50 - 100 mm;

0,01s+ 4.0 mm, but not more than 6 mm - for parts with a thickness of more than 100 mm.

14. The minimum values ​​of fillet weld legs are given in.

15. When using carbon dioxide welding instead of manual arc welding, the leg of the design fillet weld can be reduced to the values ​​​​given in.

16. When welding in carbon dioxide with an electrode wire, which ensures the production of weld metal with a higher tensile strength than that of the base metal, the leg of the design fillet weld can be reduced to the values ​​​​given in the recommended one.

14 - 16. (Introduced additionally, Amendment No. 1).

17. In butt, tee and corner joints with a thickness of more than 16 mm, made under installation conditions, it is allowed to increase the nominal value of the size b up to 4 mm. In this case, the seam width can be increased accordingly e, e 1 .

18. In places where welds overlap and where defects are corrected, it is allowed to increase the size of welds up to 30% of the nominal value.

19. When preparing edges using hand tools, the maximum deviations of the edge bevel angle can be increased to ± 5°. In this case, the seam width can be changed accordingly e, e 1 .

17 - 19. (Introduced additionally, Amendment No. 3).

mm

Note . The minimum value of the leg should not exceed 1.2 times the thickness of the thinner element.

mm

Note . The given data does not apply to connections made when welding with an extended electrode extension or with direct current polarity.

(Introduced additionally, Amendment No. 1).

mm

(Introduced additionally, Amendment No. 3).

INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the research and production association TsNIITMASH.

PERFORMERS

M. M. Borisenko(topic leader); V. D. Khodakov; E. G. Starchenko.

2. APPROVED AND ENTERED INTO EFFECT by Resolution of the State Committee of Standards of the Council of Ministers of the USSR dated July 28, 1976 No. 1826.

3. The inspection period is 1990. The inspection frequency is 5 years.

4. Standard meetsTGL 14905/03 regarding the form and content of tables of welded joints.

5. INSTEAD GOST 14771-69.

6. REFERENCED REGULATIVE AND TECHNICAL DOCUMENTS.

7. REISSUE with Amendments No. 1, 2, 3, approved in March 1982, December 1986, January 1989 (IUS 6-82, 3-87, 4-89).

5. When making the root of a multilayer weld using a welding method different from the main method by which the edges are filled, the values ​​of the structural elements of the welded joint must be selected according to the main welding method. In this case, the designation of the welding method should be made as a fraction, the numerator of which indicates the designation of the welding method of the root of the seam, and the denominator indicates the designation of the main welding method.

6. For welded joints C12, C21, C23, C24, U7, U10, T7, having the thickness of the parts s= 12 mm or more, as well as for connections C15, C16, C25, C27, U8, T8, having the thickness of the parts s= 20 mm or more, performed using the UP welding method, blunting is allowed With= 5 ± 2 mm.

Table 48

7. Butt welding of parts of unequal thickness in the case of a difference in thickness not exceeding the values ​​​​indicated in the table. 48, must be produced in the same way as parts of the same thickness; the structural elements of the prepared edges and the dimensions of the weld should be selected according to their greater thickness.

To achieve a smooth transition from one part to another, an inclined position of the seam surface is allowed (Fig. 1).

If the difference in the thickness of the parts being welded exceeds the values ​​​​indicated in the table. 48, on a part with a large thickness s 1 a bevel should be made on one or both sides to the thickness of the thin part s, as indicated in the devil. 2 and 3. In this case, the structural elements of the prepared edges and the dimensions of the weld should be selected according to the smaller thickness.

8. Size and maximum deviations of fillet weld leg TO And K 1 must be installed during design. In this case, the leg size should be no more than 3 mm for parts with a thickness of up to 3 mm inclusive, and 1.2 times the thickness of a thinner part when welding parts with a thickness of over 3 mm. The maximum deviations of the fillet weld leg size from the nominal value are given in Appendix 4.

9. (Deleted, Amendment No. 1).

10. (Deleted, Amendment No. 3).

11. Convexity or concavity of a fillet weld is allowed up to 30% of its leg, but not more than 3 mm. In this case, concavity should not lead to a decrease in the value of the leg K p(Fig. 4), installed during design.

Note. Cathetus TOn is the leg of the largest right triangle inscribed in the outer part of the fillet weld. With a symmetrical seam behind the leg TOn any of the equal legs is accepted, with an asymmetrical seam - the smaller one.

(Changed edition, Amendment No. 3).

12. Before welding, the displacement of the edges relative to each other is allowed no more than:

0,2s mm - for parts up to 4 mm thick;

0,1s+ 0.5 mm - for parts with a thickness of 5 - 25 mm;

3 mm - for parts with a thickness of 25 - 50 mm;

0,04s+ 1.0 mm - for parts with a thickness of 50 - 100 mm;

0,01s+ 4.0 mm, but not more than 6 mm - for parts with a thickness of more than 100 mm.

13. When welding in carbon dioxide with electrode wire with a diameter of 0.8 - 1.4 mm, it is allowed to use the main types of welded joints and their structural elements in accordance with GOST 5264-80.

14. The minimum values ​​of fillet weld legs are given in Appendix 1.

15. When using carbon dioxide welding instead of manual arc welding, the leg of the design fillet weld can be reduced to the values ​​​​given in Appendix 2.

16. When welding in carbon dioxide with an electrode wire, which ensures the production of weld metal with a higher tensile strength than that of the base metal, the leg of the design fillet weld can be reduced to the values ​​​​given in recommended Appendix 3.

14 - 16.

17. In butt, tee and corner joints with a thickness of more than 16 mm, made under installation conditions, it is allowed to increase the nominal value of the size b up to 4 mm. In this case, the seam width can be increased accordingly e, e 1 .

18. In places where welds overlap and where defects are corrected, it is allowed to increase the size of welds up to 30% of the nominal value.

19. When preparing edges using hand tools, the maximum deviations of the edge bevel angle can be increased to ± 5°. In this case, the seam width can be changed accordingly e, e 1 .

17 - 19. (Introduced additionally, Amendment No. 3).

Note. The minimum value of the leg should not exceed 1.2 times the thickness of the thinner element.

Note. The given data does not apply to connections made when welding with an extended electrode extension or with direct current polarity.

APPENDICES 1-3.(Introduced additionally, Amendment No. 1).

APPENDIX 4.(Introduced additionally, Amendment No. 3).

GOST 14771-76

INTERSTATE STANDARD

SHIELDED ARC WELDING

WELDED CONNECTIONS

MAIN TYPES, CONSTRUCTION ELEMENTS AND DIMENSIONS

Official publication

Standardinform

INTERSTATE STANDARD

Gas shielded arc welding

WELDED JOINTS

Main types, structural elements and dimensions

Gas-shielded arc welding.

Main types, design elements and dimensions MKC 25.160.40

GOST 14771-69

By Resolution of the State Committee of Standards of the Council of Ministers of the USSR dated July 28, 1976 No. 1826, the introduction date was set

The validity period was removed by Gosstandart Decree dated June 18, 1992 No. 553

1. This standard establishes the main types, structural elements and dimensions of welded joints made of steels, as well as alloys on iron-nickel and nickel bases, performed by gas-shielded arc welding.

The standard does not establish the main types, structural elements and dimensions of welded joints of steel pipelines in accordance with GOST 16037-80.

2. The following designations of welding methods are adopted in the standard:

IN - in inert gases, non-consumable electrode without filler metal;

INP - in inert gases with a non-consumable electrode with filler metal;

IP - in inert gases and their mixtures with carbon dioxide and oxygen with a consumable electrode;

UP - in carbon dioxide and its mixture with oxygen with a consumable electrode.

3. The main types of welded joints must correspond to those indicated in the table. 1.

Official publication Reproduction prohibited

Edition (December 2006) with Amendments No. 1, 2, 3, approved in March 1982, December 1986,

January 1989 (IUS 6-82, 3-87, 4-89).

© Standards Publishing House, 1976 © Standartinform, 2007

ready]

Character

Cross-sectional shape

With flange on two edges

Unilateral

With flange on one edge

T///F\m

Unilateral

Without bevel

Unilateral

Unilateral

Bilateral

GOST 14771-TB

Character

Cross-sectional shape

Thickness of welded parts, mm, for welding methods

Conditional

designation

welded

connections

Unilateral

Unilateral

With one edge beveled

Unilateral

Unilateral

castle

With a curved bevel of one edge

With a broken bevel on one edge

Bilateral

metric bevels of one edge

GOST 14771-TB S.

4 GOST 14771-TB

Character

Cross-sectional shape

Thickness of welded parts, mm, for welding methods

Conditional

designation

welded

connections

With a broken bevel of two edges

With two symmetrical bevels of two lumps

With two symmetrical curves

Bilateral

two edges themselves

With two symmetrical lo-

two edges

With flange on one edge

Unilateral

No beveled edges

Cross-sectional shape

Thickness of welded parts, mm, yes welding methods

Conditional

designation

0,8-12,0

GOST 14771-TB

Character

Cross-sectional shape

Thickness of welded parts, mm, for welding methods

Conditional

designation

welded

Without bevel

Bilateral

Unilateral

1

With one edge beveled

»

Bilateral

1

metric bevels of one edge

Bilateral

Unilateral

Without bevel

Bilateral

0,8-10,0

technical specifications

GOST 14771-TB S.

4. Structural elements of welded joints, their dimensions and maximum deviations for them must correspond to those indicated in the table. 2-47. In addition to the specified welding methods, it is allowed to use other methods of arc welding in shielding gases.

Dimensions, mm

Table 3

Dimensions, mm

Table 4

Structural elements

weld seam

yeah, no more

+0,2

in

1,0-1,4

^Size for reference

+ 1,0

Table 5

Dimensions, mm

Table 6

-Yo oh I I I »

pp

Dimensions, mm

S. 10 GOST 14771-76

Table 10

A

Welding method

1

U

GOST 14771-76 S. 11

12 GOST 14771-76

Dimensions, mm

£е I 3 Zon yo o e as re

S 03 5 £ o tz X f S o

Welding method

Prev. off

Prev. off

Prev. off

Prev. off

y, city (limit off +2°)

GOST 14771-76 S. 13

14 GOST 14771-TB

Table 15

Dimensions, mm

Table 16

GOST 14771-TB S. 17

18 GOST 14771-TB

GOST 14771--76 P. 19

20 GOST 14771-76

GOST 14771-TB S. 21

Table 25

Dimensions, mm

Table 26

Dimensions, mm

Table 27

Table 28

Dimensions, mm

Table 29

Table 30

^Size for reference

Dimensions, mm

Table 31

Dimensions, mm

Table 32

Table 33

Dimensions, mm

Table 34

Dimensions, mm

Table 35

GOST 14771-TB S. 27

Dimensions, mm

28 GOST 14771-76

Table 38

Dimensions, mm

Table 39

Table 40

Dimensions, mm

Table 41

Conditional

designation

welded

connections

Structural elements

prepared edges of welded parts

weld seam

Prev. off

technical specifications

1

INP, IP, UP

6,0-20,0

+ 1,0

+2,0

Dimensions, mm

Table 43

and I

Welding method

Prev. off

Prev. off

Dimensions, mm

S. 32 GOST 14771-76

Table 46

Conditional

designation

welded

connections

Structural elements

prepared edges of welded parts

weld seam

+ 1,0

+ 1,0

+2,0

Table 48

(Changed edition, Amendment No. 1, 2, 3).

5. When making the root of a multilayer weld using a welding method different from the main method used to fill the edges, the values ​​of the structural elements of the welded joint must be selected according to the main welding method. In this case, the designation of the welding method should be carried out as a fraction, the numerator of which indicates the designation of the method of welding the root of the seam, and the denominator indicates the designation of the main welding method.

6. For welded joints C12, C21, C23, C24, U7, U10,

T7, having a part thickness s = 12 mm or more, as well as for connections C15, C16, C25, C27, U8, T8, having a part thickness s = 20 mm or more, made by the UP welding method, blunting with = (5+ 2) mm.

7. Butt welding of parts of unequal thickness in the case of a difference in thickness not exceeding the values ​​​​indicated in the table. 48, should be carried out in the same way as parts

equal thickness; the structural elements of the prepared edges and the dimensions of the weld should be selected according to their greater thickness.

To achieve a smooth transition from one part to another, an inclined position of the seam surface is allowed (Fig. 1).

If the difference in the thickness of the parts being welded exceeds the values ​​​​indicated in the table. 48, on a part with a large thickness Sj, a bevel should be made on one or both sides to the thickness of the thin part s, as indicated in Fig. 2 and 3. In this case, the structural elements of the prepared edges and the dimensions of the weld should be selected according to the smaller thickness.

8. The size and maximum deviations of the fillet weld leg K and K\ must be established during design. In this case, the leg size should be no more than 3 mm for parts with a thickness of up to 3 mm inclusive, and 1.2 times the thickness of a thinner part when welding parts with a thickness of over 3 mm. The maximum deviations of the fillet weld leg size from the nominal value are given in Appendix 4.

9. (Deleted, Amendment No. 1).

10. (Deleted, Amendment No. 3).

11. Convexity or concavity of a fillet weld is allowed up to 30% of its leg, but not more than 3 mm. In this case, the concavity should not lead to a decrease in the value of the leg K p (Fig. 4) established during the design.

Note. The leg K p is the leg of the largest right triangle inscribed in the outer part of the fillet weld. With a symmetrical seam, any of the equal legs is taken as the leg Kp, with an asymmetrical seam - the smaller one.

(Changed edition, Amendment No. 3).

12. Before welding, the displacement of the edges relative to each other is allowed no more than:

0.2 s mm - for parts up to 4 mm thick;

0.1 s + 0.5 mm - for parts with a thickness of 5-25 mm;

3 mm - for parts with a thickness of 25-50 mm;

0.04 s + 1.0 mm - for parts with a thickness of 50-100 mm;

0.01 s + 4.0 mm, but not more than 6 mm - for parts with a thickness of more than 100 mm.

13. When welding in carbon dioxide with electrode wire with a diameter of 0.8-1.4 mm, it is allowed to use the main types of welded joints and their structural elements in accordance with GOST 5264-80.

14. The minimum values ​​of fillet weld legs are given in Appendix 1.

15. When using carbon dioxide welding instead of manual arc welding, the leg of the design fillet weld can be reduced to the values ​​​​given in Appendix 2.

16. When welding in carbon dioxide with an electrode wire, which ensures the production of weld metal with a higher tensile strength than that of the base metal, the leg of the design fillet weld can be reduced to the values ​​​​given in Appendix 3.

14-16. (Introduced additionally, Amendment No. 1).

17. In butt, tee and corner joints with a thickness of more than 16 mm, made under installation conditions, it is allowed to increase the nominal value of size b to 4 mm. In this case, the seam width e, e± can be increased accordingly.

18. In places where welds overlap and where defects are corrected, it is allowed to increase the size of welds up to 30% of the nominal value.

19. When preparing edges using hand tools, the maximum deviations of the edge bevel angle can be increased to +5°. In this case, the seam width e, b\ can be changed accordingly.

17-19. (Introduced additionally, Amendment No. 3).

Note. The minimum value of the leg should not exceed 1.2 times the thickness of the thinner element.

Fillet weld legs for welding methods

Note. The given data does not apply to connections made when welding with an extended electrode extension or with direct current polarity.

Fillet weld leg for the ratio of the tensile strength of the weld metal to the tensile strength

rupture of the base metal

APPENDICES 1-3. (Introduced additionally, Amendment No. 1).

APPENDIX 4. (Introduced additionally, Amendment No. 3).

Editor V.N. Kopysov Technical editor L.A. Guseva Corrector M.V. Beech Computer layout L.A. Circular

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